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I own a 2000 328Ci, and man do I love it! I keep her in pristine condition inside and out. I just re-did the whole coolant system about a month ago. She's running like she's brand spanking new. Fortunately, I stumbled upon about $4,000 and wanna treat her to some nice upgrades. I am pretty satisfied with her exterior and want to spicy things up from underneath the hood. Any ideas? I'm open to anything. What will give me the most bang for my buck? Thanks guys!

Well I'll definitely look into it. Just curious though, you think those two will make a noticeable difference at best? I want to try to hit the 220 mark, as of right now my car is probably around low to mid 180's.

Suspension, shift linkage/short shifter, and some aesthetics. You won't pull much more power out of it unless you go F/I which is more expensive than your budget. The typical i/h/e on our cars don't do much except make noise. They can also get really expensive. A good header/exhaust setup will be $1500-ish, at least. That money can be spent much better in other places like the suspension, replacing actual wear items and tightening it up at the same time.

It's going to be hard to get to 220whp while staying N/A unless you do some serious work (pistons/cams etc). Some of the supercharged E46 guys only put down around 280-300whp with a stage 2 from AA.

Thanks, very helpful. After some extensive research I realized that it's gonna be pretty dang difficult reaching that goal. I'll probably get a tune, exhaust, intake, and suspension. Whatever is rest will go to aesthetics then. Thanks for the input, really appreciate it.